Evidence map›Paper›PMID 33006309›Full record

ArticleJournal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine2021

Survival benefit of continuous positive airway pressure in Japanese patients with obstructive sleep apnea: a propensity-score matching analysis.

Kei Nakamura, Hiroshi Nakamura, Kazuyo Tohyama, Chikashi Takara, Chiho Iseki, Mark Woodward, Kunitoshi Iseki

Open access · bronzeAbstract read
In one paragraph

Article in Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 3 pooled it
1.1field-weighted citation impact, top 23% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 3 syntheses or guidelines pooled it, 17 citations in OpenAlex.

  1. Pooled it
  2. Long-term effects on clinical event, mental health, and related outcomes of CPAP for obstructive sleep apnea: a systematic review.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2024
    Pooled it
  3. Large variability in definitions of sleep apnea indices used in clinical studies.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2024
    Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 4 countries.

Kei NakamuraUrasoe General Hospital, Okinawa, Japan.
Hiroshi NakamuraNakamura Clinic, Urasoe, Okinawa, Japan.
Kazuyo TohyamaNakamura Clinic, Urasoe, Okinawa, Japan.
Chikashi TakaraNakamura Clinic, Urasoe, Okinawa, Japan.
Chiho IsekiNakamura Clinic, Urasoe, Okinawa, Japan.
Mark WoodwardThe George Institute for Global Health, Imperial College, London, United Kingdom.
Kunitoshi IsekiNakamura Clinic, Urasoe, Okinawa, Japan.
Nakamura Toho Research Institute · JPImperial College London · GBUrasoe General Hospital

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

objectivesContinuous positive airway pressure (CPAP) improves quality of life in patients with obstructive sleep apneas. However, the long-term benefit in all-cause mortality and cardiovascular death are limited among Japanese.

methodsWe conducted a retrospective study of patients treated in our sleep clinic in Okinawa, Japan. All patients with full-scale polysomnography from September 1990 to December 2010 were investigated in terms of outcomes such as death (dates and causes of death) between 2012 and 2013 by chart review, telephone calls, and letters of inquiry. Propensity-score matching was performed to balance baseline characteristic differences between a CPAP user group and a nonuser group. The primary outcomes were all-cause mortality and a composite of cardiovascular disease mortality, such as heart disease and stroke, between the two groups.

resultsThe CPAP user group, almost double in number, had more severe obstructive sleep apnea, more comorbidities, smoking, and alcohol consumption compared to the nonuser group but no significant difference in Epworth Sleepiness Scale. Propensity-score matching selected 1,274 of 4,519 patients as the CPAP user group and 1,274 of 2,128 as the CPAP nonuser group. Mean age of the patients was 52.3 (±13.5) years and 79% were men. After a median follow-up of 79 (interquartile interval, 24 to 128) months in the CPAP user group and 73.5 (interquartile interval, 26 to 111) in the non-CPAP group, death from all causes occurred in 53 (4.2%) patients in CPAP user group and in 94 (7.4%) patients in CPAP nonuser group. The leading cause of death was malignancy in each group. The hazard ratios for all-cause mortality and cardiovascular disease deaths were 0.56 (95% confidence interval (CI), 0.41-0.78) and 0.54 (95% CI, 0.28-1.03) between CPAP user group and CPAP nonuser group, respectively.

conclusionsIn obstructive sleep apnea patients, CPAP use was associated with lower all-cause mortality.

Indexed as

Continuous Positive Airway PressureSleep Apnea, ObstructiveAdultAgedHumansJapanMaleMiddle AgedQuality of LifeRetrospective Studiescardiovascular diseasescontinuous positive airway pressureCPAP, mortalitymalignancyobstructive sleep apnea

Identifiers

PMID33006309
PMCPMC7853214
OpenAlexW3091334753

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.